At $325 I'd be looking for a new fabrication shop. Get that price down and your customer base growing. There is an online fabricator bid service that I could probably have these made for less than half that price, provided I had the drawing files. J/S

thanks for the advice, but the main reason for the cost is that I don't have them made in large runs.
The customer base is declining because these trucks are now 8 years out of production. I could definitely get the price down if I were to quote it out for larger runs, but I would sit on that inventory too long.
9 years ago I did a group purchase, when the trucks were still in production, and I got them considerably cheaper. It took me months to sell 20 sets. It's now a niche market. Cheap fabricated custom parts isn't going to happen.